Speed-boat.



J. DUDASH.

SPEED BOAT.

APPLICATION FILED 0018,1913.

1,1 12,057. Patented Sept. 29', 1914.

J56- 9,02 Judas-i.

JOSEPH DUIDAS H, OF PHILADELPHIA, PENNSYLVANIA.

SPEED-BOAT.

Specification of Letters Patent.

Patented Sept. 29, 1914.

I Application filed October 8, 1913. Serial No. 794,138.

To all whom it may concern Be it known that I, JosnrH DUDAsH, a subjectof the Apostolic King; of Hungary, residing at Philadelphia, in thecounty of Philadelphia and State of Pennsylvania, have invented certainnew anduseful Improvements in Speed-Boats, of which the following is aspecification.

This invention has relation to what is generally termed motor-boats andhas more particular relation tothe type of boats designated speed-boats.

The principal object of the present invention is to provide a speed-boatso arranged and constructed, that the speed thereof may be considerablyincreased without adding to the cost of maintenance and operation.

A further object of thepresent invention, is to provide a speed-boat inwhich the keel thereof is operatively equipped with a screwpropellerwhich parallels the keel, the shaft of which is driven from a pointapproximately amidship.

Other and further objects of the present invention reside in theproviding of general details of construction and arrangement of parts aswill hereinafter more fully appear.

The invention consists of the improve ments hereinafter described andfinally claimed.

The nature, characteristic features and scope of the invention, will bemore fully understood from the following description taken in connectionwith the accompanying drawings forming part hereof and inwhich:

Figure 1, is a view in longitudinal section of the speed-boat embodyingthe invention, and Fig. '2, is a view in cross section taken upon theline 2'2 of Fig. 1.

In the drawings the keel 10, of the boat 11, is shown as slanting fromstemto stern and the bow of the boat is shown as being generally taperedas at 12. Thus constructed, the boat will run with the greatest portionof its bow out of the water in contradistinction from having its bowsubmerged and cutting the water for a purpose to be presently described.Suspended from the keel 10, andpj: extending from a point approximately'amidship to a point adjacent the stern of the boat is a screw-propeller13. The shaft 14, of the propeller 13, parallels the keel 10, of theboat and is rotatably supported in bearings 15, and 16 of hangers 17,

enter the casing 20, with suflicient pressure so that the propeller 13,efficiently acting 'thereagainst may propel the boat forwardly at highspeed assuming that the motor which drives the propeller is running at aproportionate rate of speed. In this connection it is to be observedthat the motor 21, which drives the propeller-shaft 14, and which may bean internal combustion engine or electric motor or other type of motorforce is located adjacent the bow of the boat and the driving shaftthereof is connected with the propellershaft by means of a driving rod22. Universal joints 23, are present as shown in the drawings fortransmitting proper motion to the propeller-shaft. I

Shown as being bolted or otherwise secured to the bottom of the boat andto the hanger 17, is a two-part casing 24, of generally elliptical crosssection for incloslng that portion of the connecting rod 22, andpropeller-shaft 14, which would otherwise be exposed to the water. Byconstructing th1s casing 24, of elliptical cross section, very littleresisting surface is offered the water in the propulsion of the boat. Byplacing the motor 21, in the bow of the boat and con necting the same asshown and described with the propeller 13, the boat both at the sternand amidship is roomy and free of obstruction which obviously isadvantageous. By arranging the keel 10, at an angle as shown anddescribed and cutting away the bow as also described, little or noobstruction is offered water at the point opposite the forward part ofthe casing 20, and it may readily enter said casing. If the bow wasconstructed to cut the water in the propulsion of the boat the waterwould be spread to the port and starboard of the boat and away from theopen end of the caslng. By also forming the keel and bow of the boat asshown, the boat will IDOIQIGfldIlY said driving rod penetrating theboat-bottom and a casing of generally elliptical cross section forinclosing that part of the driving rod exposed to the water.

In testimony whereof, I have hereunto 15 signed my name.

JOSEPH DUDASH.

In the presence of HELEN M. Burns, WILLIAM J. JACKSON.

